You are provided with some commonly occurring materials likeglass, wool, fur, Styrofoam, aluminum foil etc, in various shapesand sizes. You are also given the ‘Tribo-electric’ series thatincludes these materials, and an electroscope. This lab requiresyou to come up with five simple experiments using a variety ofthese materials, where you charge up two objects by conduction, andthen test whether they are charged or not using conduction,induction or polarization. Make sure you include one case ofelectroscope use for testing charge on an object, and at least oneof repulsion between two objects carrying like charges. Theexperiments that you come up with can be made effective using thetribo-electric series, since it gives an indication of which twomaterials will charge up well on contact with each other, and whichone will be positive or negative. Your lab report should includethe following: Objective: A short and to the point sentenceproviding the objective of the lab. This will be followed by a listof your experiments as: Experiment #: A short sentence or twodescribing your experiment. Observation: What you actuallyobserved. Explanation: Explain briefly what you observe. Includeone full explanation of each process: conduction, induction,polarization, and also one of the working of the electroscope.Refer to the tribo-electric series where required. If you haveexplained a process once, you do not have to repeat it for otherexperiments; just mention the name of the process. An experimentthat is theoretically sound may sometimes not work well whenperformed. If that is the case, include in your lab report thefactors that you think contributed to the failure of thatparticular experiment.
1)Induction experiment : rub balloon on shirt (becomesnegatively charged, then bring close to an aluminium foil ball )show diagram on the charges
2)Polarization experiment : rub balloon with hair , neutralpaper will be attracted to balloon.
On top is the instructions provided i came up with 2 experimentsone induction and the other polarization please show a diagram forthe charges (what happens) and explain what should be observed andtheoretical explanations of induction and polirization in thesespecific experimets I came up with! :)
